Let's see asking price $29,870,610. With 20% down payment of $5,974,122 that would leave a mortgage of $23,896,488. At say 6% interest financed over 30 years the monthly payment would be $143,272.
Ok, I'm out.
JHAP ~~~~~~~~~~ "My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives." ...Hedley Lamarr (that's Hedley not Hedy)